US Bridges

County Road over Rye Grass Coulee

Good

Franklin County, Washington · 0.04W JCT R 727 · Structure no. 084816000000000

Built
1979
46 years old
Condition
Good
inspected November 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
25 ft
1 main span
Daily traffic
37
2020 count
Owner
County
County Highway Agency

About this bridge

County Road over Rye Grass Coulee is a prestressed concrete stringer/multi-beam or girder carrying County Road over Rye Grass Coulee in Franklin County, Washington. It was built in 1979, so it is 46 years old, younger than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 37 vehicles a day, roughly 20% of them trucks, projected to reach 59 by 2040. The structure is 25 ft (7.6 m) long and 32 ft wide.

CarriesCounty Road
CrossesRye Grass Coulee
Location0.04W JCT R 727
RouteCounty Highway 7050
Coordinates46.47451, -118.76294
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating33.6 US tons
Inventory rating22.5 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadH 15
Structure length25 ft (7.6 m)
Longest span25 ft (7.6 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic37 (2020)
Projected traffic59 by 2040
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road over Rye Grass Coulee built?

It was built in 1979, making it 46 years old in 2025.

What condition is County Road over Rye Grass Coulee in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2022.

How much traffic does County Road over Rye Grass Coulee carry?

About 37 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is County Road over Rye Grass Coulee?

The structure is 25 ft (7.6 m) long with a longest span of 25 ft (7.6 m) and a deck 32 ft wide.

Who owns County Road over Rye Grass Coulee?

It is owned by the County Highway Agency.